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Old 06-10-2018, 12:18 PM   #1
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Join Date: Jun 2011
Posts: 204
Caught my coach on FIRE!

I did the dumbest thing yesterday and let this be a warning to others.

I was going to start my generator, but the batteries were low. I decided to boost them off with my pick-up. I connected the positive end of the booster cable to the positive post on the house battery bank and then connected the negative booster cable to another positive battery post (I thought it was negative). Both posts had several connections on them, so....

I connected the booster cable to my pick-up and noticed nothing was happening. The generator would still not start.
I heard a loud POP, went out to see what had happened and the booster cable was on fire from the pick-up battery to the coach batteries.

Those little fire extinguishers don't last long, but I did get it put out.

I then had to clean up the mess and buy 4 new 6 volt batteries.
The next issue was trying to figure out how to connect them. Fortunately, I did take pictures, but unfortunately, the positive and negative terminals we hard to distinguish. I was finally able to get everything properly connected and all seems to be working properly now.

Just a word of warning: Make sure you understand your 6 volt battery system and don't assume where the negative post is.

Wm Mayberry
2003 National Tradewinds 375LE
Palmetto, FL

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Old 06-10-2018, 12:26 PM   #2
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I've purchased red electrical tape and wrapped the last 3" of every positive cable to remind me , what's what ,on all the chassis and coach systems.
Too many black cables in the system.

99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
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Old 06-10-2018, 12:29 PM   #3
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How come you didnt just start the engine in the RV? Most, some charges all the batteries.
1999 Bounder 32H Ford V10, 2012 Ford Focus, Pretty DW, 1 cat. Retired USAF
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Old 06-10-2018, 12:31 PM   #4
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Wow close call!

I did exactly what Skip did with his wires.

Get a good sized fire extinguisher too. Those little ones won't do the job in a real emergency.
Tony & Ruth........... FMCA#F416727
Newmar Dutch Star 4320, Spartan MM Chassis, Cat C9, 2018 Jeep Grand Cherokee Summit, Blue Ox Aventa LX, and Brake Buddy. TST 507 TPMS
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Old 06-10-2018, 01:04 PM   #5
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Just as easy to make a big mistake as a small one. I speak from experience. Glad nothing serious happened.

Good luck and thanks for having the courage to share it,,, we all benefit from the knowledge.
Good Luck and keep us posted please. "Q"
1999 Newmar, Mountain Aire 3768, V-10, CAI, Headers.
"Spending our kids inheritance one trip at a time"
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Old 06-10-2018, 01:56 PM   #6
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Originally Posted by mrt_1111 View Post
How come you didnt just start the engine in the RV? Most, some charges all the batteries.
I tried to, but it didn't work.
I guess that's something else I'll need to check.

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Old 06-10-2018, 01:56 PM   #7
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With your phone take several pics prior to an incident. I also made a wiring schmetic on the coach. I've got 6 house batteries in 2 locations....
Full Timers.
2015 Fleetwood Discovery 40E on a Freightliner XCS chassis with a Cummins ISL9 pulling 1 and/or 2 motorcycles, '07 Honda Accord OR a 17' Runabout Boat.
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Old 06-10-2018, 01:58 PM   #8
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Thanks for the heads-up! Glad you didn't have more damage!
Joe & Annette

2002 Monaco Windsor 40PBT, 2013 Honda CRV AWD
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Old 06-11-2018, 08:00 AM   #9
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Caught my coach on FIRE!

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Label the cables like this and its a big help.

House batteries are numbered H1 through H4 and the cables are numbered to match.

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